Virgil van Dijk was withdrawn while Liverpool were 2-0 down at half-time at Brentford on Monday - and after the defeat, Jurgen Klopp confirmed it was a hamstring problem.
It was a shambolic first-half showing from the Reds, which saw them concede from an Ibrahima Konate own goal and then Yoane Wissa's strike for the Bees.
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Brentford vs Liverpool - Premier League: Live score and updates 40.